metallurgy test...just for fun....

T

tmickley

Joined
Apr 4, 2001
Messages
1,803
I’m trying to better learn this stuff so I made this ‘test’ up for fun. The answers will be posted in few message later in this thread. Don't be lazy, get out a piece of paper and pencil and see how you score.
I've already found a significant typo just after posting this, let me know if there are others.

1. Carbides precipitate during:
A. the quench
B. the cryo
C. the Temper
D. Just under Non-magnetic temp
E. consumption of extra spicy taco’s on Taco Tuesday

2. Missing the TTT nose refers to:
A. Avoiding pearlite transformation
B. Avoiding Martensite transformation
C. converting to Martensite
D. Both A and C
E. Both B and C
F. None of the above

3. Bainite is
A. Is between Pearlite and Austenite
B. Is between Pearlite and Ferrite
C. Is between Pearlite and Martinsite


4. Generally, to make steel good for a knife:
A. You want to convert Austenite to Martensite
B. You want to convert Martensite to Austenite
C. You want to convert Trootsite to Bainite
D. You want to convert Eutectoid to non-eutectoid
E. Forge only at night, with chicken feet, facing north

5. Generally, steels that are _______ in carbon respond best to cryo
A. higher
B. lower
C. devoid of
D. Face centric

6. A Snap Temper is:
A. A very short temper at approximately half of ‘normal’ temper temperature
B. A very long temper to minimize shock before regular temper
C. A low temperature, brief temper to stabilize material before cryo

7. Grain size, generally speaking, if:
A. larger, makes the steel tougher
B. smaller, makes the steel tougher
C. uneven in size, but spread around consistently, makes steel tougher
E. Makes a huge difference in the taste of single malt whiskey


8. Generally, in order to be effective, cryo treatment has to:
A. be at least 0F
B. be at least -90F
C. be at least -300F
D. be at least 32F

9. Austenite is:
A. Cubic centeric
B. Face polygonal centric
C. Body tetragonal centric
D. Lattice centric


10. Martensite is:
A. Cubic centeric
B. Face centric
C. Body tetragonal centric
D. Lattice centric

11. The threshold for hyper-eutectoid is:
A. .60%
B. .70%
C. .80%
D. .90%
E. Two Barry Manilow songs in a row on the radio

12. Spheroidizing is:
A. Damn tough to remember what it is
B. pooled carbides
C. is largely bainite
D. is largely cementite
E. alloys forming round centric borders during temper

13. If you miss the TTT nose, you get:
A. Troostite
B. Cementite
C. Austenite
D. Martensite
E. Pearlite

14. Generally, tempering range is:
A. 350 to 850F
B. 850 to 1300F
C. 1400 to 1800F

15. Generally, stress relieving (annealing) range is:
A. 350 to 850F
B. 850 to 1300F
C. 1400 to 1800F

16. To spheroid, you must be:
A. Above critical
B. Below critical
C. Above and slow cool

17. When you spheroidize metal, it is:
A. tougher
B. more brittle
C. harder to grind
D. easier to grind
E. make metal marbles

18. Metals have molecules:
True or False.

19. Annealing is the same as Normalizing
True or False

20. Edge packing a blade:
A. Packs the atoms of the steel for better edge holding
B. Refines the grain by increasing grain forming nuclei
C. Raises the hardness of the blade
D. any benefit is erased when the blade is brought to critical temp

21 Chicken feet used during forging:
A. Increase the edge holding of a blade
B. Allow you to face true North
C. Are only allowed during a full moon
D. Give Mark Williams something to snack on
E. Refine the grain, increasing toughness

22. Cryo treatment will lower grain size
True or False?

No one would be happy unless there was a way to grade the score so I’ll make one up.
# correct
20+ metallurgist
15+ heat treater
10+ student
 
Spoiler spacer - answers below
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.


the correct answers are marked with a *

1. Carbides precipitate during:
A. the quench
B. the cryo
*C. the Temper
D. Just under Non-magnetic temp
E. eating extra spicy taco’s

2. Missing the TTT nose refers to:
A. Avoiding pearlite transformation
B. Avoiding Martensite transformation
C. converting to Martensite
*D. Both A and C
E. Both B and C
F. None of the above

3. Bainite is
A. Is between Pearlite and Austenite
B. Is between Pearlite and Ferrite
*C. Is between Pearlite and Martinsite


4. Generally, to make steel good for a knife:
*A. You want to convert Austenite to Martensite
B. You want to convert Martensite to Austenite
C. You want to convert Trootsite to Bainite
D. You want to convert Eutectoid to non-eutectoid
E. Forge only at night, with chicken feet, facing north

5. Generally, steels that are _______ in carbon respond best to cryo
*A. higher
B. lower
C. devoid of
D. Face centric

6. A Snap Temper is:
A. A very short temper at approximately half of ‘normal’ temper temperature
B. A very long temper to minimize shock before regular temper
*C. A low temperature, brief temper to stabilize material before cryo

7. Grain size, generally speaking, if:
A. larger, makes the steel tougher
*B. smaller, makes the steel tougher
C. uneven in size, but spread around consistently, makes steel tougher
E. Makes a huge difference in the taste of single malt whiskey


8. Generally, in order to be effective, cryo treatment has to:
A. be at least 0F
*B. be at least -90F
C. be at least -300F
D. be at least 32F

9. Austenite is:
*A. Cubic centeric
B. Face polygonal centric
C. Body tetragonal centric
D. Lattice centric


10. Martensite is:
A. Cubic centeric
B. Face centric
*C. Body tetragonal centric
D. Lattice centric

11. The threshold for hyper-eutectoid is:
A. 60%
B. 70%
*C. 80%
D. 90%
E. Two Barry Manilow songs in a row on the radio

12. Spheroidizing is:
A. Damn tough to remember what it is
B. pooled carbides
C. is largely bainite
*D. is largely cementite
E. alloys forming round centric borders during temper

13. If you miss the TTT nose, you get:
A. Troostite
B. Cementite
C. Austenite
D. Martensite
*E. Pearlite

14. Generally, tempering range is:
*A. 350 to 850F
B. 850 to 1300F
C. 1400 to 1800F

15. Generally, stress relieving (annealing) range is:
A. 350 to 850F
*B. 850 to 1300F
C. 1400 to 1800F

16. To spheroid, you must be:
A. Above critical
*B. Below critical
C. Above and slow cool

17. When you spheroidize metal, it is:
A. tougher
B. more brittle
C. harder to grind
*D. easier to grind
E. make metal marbles

18. Metals have molecules:
True or *False.

19. Annealing is the same as Normalizing
True or *False

20. Edge packing a blade:
A. Packs the atoms of the steel for better edge holding
B. Refines the grain by increasing grain forming nuclei
C. Raises the hardness of the blade
*D. any benefit is erased when the blade is brought to critical temp

21 Chicken feet used during forging:
A. Increase the edge holding of a blade
B. Allow you to face true North
C. Are only allowed during a full moon
*D. Give Mark Williams something to snack on
E. Refine the grain, increasing toughness

22. Cryo treatment will lower grain size
True or *False?

No one would be happy unless there was a way to grade the score so I’ll make one up.
# correct
20+ metallurgist
15+ heat treater
10+ student
 
I missed 10 & 11.There should be a
#23.
Heat treat relish is:
1) A great desire to quench steel.
2) The reason most knife makers spend New Years Eve alone.
3) IG's favorite etchant.
4) A carcinogenic,toxic,dangerous chemical.It should be used only by qualified smiths.
5) An excellent sauce for chicken feet.
 
Referring to questions 9 & 10 the atomic packing structures are:

Body centered cubic-BCC...Ferrite structure
Face centered cubic-FCC...Austenite structure
Body centered tetragonal-BCT...Approximated by Martensite as it attempts to resume the BCC structure.


In # 20 are you implying that you can compact the atomic structure prior to heat treating which will anneal it? (The annealing process is actually the thermal recrystallization. We preserve it by slow cooling)
 
shgeo said:
In # 20 are you implying that you can compact the atomic structure prior to heat treating which will anneal it? (The annealing process is actually the thermal recrystallization. We preserve it by slow cooling)
Click to expand...
No, I think most believe that packing the atomic structure of metal is beyond their 3 pound hammer. I was kinda poking at the myth that grain can be refined by breaking up the 'crystalline structure' and that benefit can be retained after heat treating.
 
uhhh...
I have a perfectly good excuse for not knowing 12 of them- and for never hearing of a cryo.

0-3 Don't bother trying
4-9 Uhhh... you've got a chance

I'm the later
 
Hey great quiz! Good learning tool and reference. I did get one question right............#21, but it was to easy!
Thank you for sharing, may I use it with my beginner bladesmithing students?
Carl Rex
 
Man - Do I need to study up! Good quiz.
I am really haveing a tough time getin this stuff to stay in my head. What book has this info in an easy to read format?
I have Wayne Goddards 50 dollar knife shop.
 
bladsmth said:
I missed 10 & 11.There should be a
#23.
Heat treat relish is:
1) A great desire to quench steel.
2) The reason most knife makers spend New Years Eve alone.
3) IG's favorite etchant.
4) A carcinogenic,toxic,dangerous chemical.It should be used only by qualified smiths.
5) An excellent sauce for chicken feet.
Click to expand...

#4 :D

at least I got one right :D if it's #4 :D

but what if I eat chicken feet too? they have built in tooth picks you know :D
 
Thanks Tracy, just think it would give them a better idea that it's not all voodoo and potions.
Carl Rx
 
Can be tastey. Just depends on what you got to wash them down with, right Bro!
 
You must log in or register to reply here.
Back
Top